Bobbin



R. P. BENNETT July 29, 1952 BOBBIN Filed Aug. 51, 1949 I4 l2 IO 9 llFIG.2.

FIG.4.

FIG. 3.

/l/lll//ll 91" lill/0111111A INVENTOR: Rex ford -P. Bennett AttorneysPatented July 29, 1952 BOBBIN Rexford RBennett, Honesdale, Pa., assignertoV Y The Formica Company, a corporation of Ohio Application August 31,1949, Serial No. 11.3?270 Claims. f 1

This invention relates to bobbins vfor use on textile winding andtwisting machines, and in particular it relates to bobbins havingcharacteristics which make them especially suitable for use in highspeed machinery and with modern synthetic yarns such asnylon whichhave a-very high contractive force.

The principal object of thevinvention is to provide a bobbin in which acore of light metal such as aluminum forms a central assembly member towhich are aixed a relatively thin nonmetallic bobbin barrel and' bobbinheads, in order that the assembled bobbin'may be light, yet strong,rigid, and well balanced.

Another object is to provide a bobbin which is substantially free of anytendency to distort under the contracting force of nylon or othersynthetic yarn, :and which will not damage the yarn by snagging orcatching it.

Another object is to provide 4a bobbin which may be readily disassembledinto its component Y parts so as to facilitate repair of the bobbin incase of wear or dam-age. y

Because of the light weight and excellent balance which are madepossible by the use of a lightweight metal core, the improved bobbin maybe satisfactorily employed on spinning machines which operate at speedsof 10,000 to v16,()00 R.. P. M. or higher, and even at such"s`peeds has`almost no tendency to wobble, vibrate, or climb the spindle blade.

The invention is illustrated in a preferred embodiment in theaccompanying drawing, in which: Fig. 1 is a longitudinal sectional viewof the bobbin mounted on a tapered spindle; Fig. 2 is an enlargedfragmentary sectional view of one end of the bobbin, showing the detailsof assembly; and Figs. 3 and 4 are fragmentary sectional views similarto Fig. 2 showing alternative arrangements for securing the core headerto the bobbin core.

The central element of the bobbin is a lightweight metal core,preferably formed of aluminum, having permanently secured within it acontinuous sleeve of laminated plastic material which receives thespindle blade of a textile machine. The use of a laminated plastic, orother non-metallic sleeve avoids `the smudging of the spindle bladewhich is inevitable if a metal bearing is used. Likewise, the plasticsleeve has no tendency to cling or seize when the bobbin is Referring tothe drawings, an A.aluminum or other lightweight metal core 5 isprovided with a fixed non-metallic sleeve 6, said sleeve preferablybeing composed of laminated plastic impregnated with a binder andbeingsecured within lthe metal core 5 by rspinning over thej ends of .thecore as at 1, and being of suitable shape and dimensions to nt snugly onthe spindle. blade 8 of a textile machine. In the preferred form shownin Figs. 1 and 2 the metal core 5 has threads 86 at its' end portionsvto receive lightweight annular metal core headers 9 which have theirouter faces annularly shouldered at Il).

In order to assure alignment,concentricity and balancing of the coreandA core headers,they are preferably assembled rough, and machined froma single center after assembly.

A bobbin barrel I I is soproportioned that it iits snugly on the coreheaders 9 and has its ends flush with the outer faces of said headers.The barrel likewise is composed of a non-metallic material, preferably a'laminated plastic impregnated with a binder. They barrel should be of amaterial which will remainundstorted at temperatures of 225 F.' andmoisture conditions of being removed from a tapered spindle blade, and Arelative humidity. y

A pair of annular compressible washers I2 and I 3 surround the annularshoulders I9 of the core headers 9 and overlie the ends of the bobbinvbarrel II.

Laminated plastic bobbin heads M and I5 overlie `the washers I2 and I3,respectively, and are screwed to the Core headers 9 by means of aplurality of screws I6. The inner face of each bobbin head is providedwith an annular shoulder I'I to engage the shoulder IIJ of the coreheader 9 so Ias to assure concentricity of the bobbin head. The screwsI5 are vdrawn up very tightly in order to grip the barrel II rmly andlock it against longitudinal movement. Likewise, the firm gripcompresses the Washers l2 and I3 so that'they iill any irregularities inthe abutting surfaces of the barrel I I and bobbin heads I4 and I5, thusavoiding -any possibility of yarn being caught or snagged in a crackbetween the barrel and the bobbin heads.

A small cup-shaped metal ring traveler guide I8 ispressed into the lendof the bobbin, as seen 3 in Fig. 1, to control yarn tension in the usualWay.

Figs. 3 and 4 illustrate modified arrangements for securing the coreheaders to the metal core. In the form shown in Fig. 3, the metal core25 is tapered at 26 to retain the sleeve 6 in place, and has flared ends21 to engage a wedging face 28 of a core header 29.thus securing theheader rmly between the taper 26 and the flared ends 21. The remainderof the assembly is identical with that shown in Figs. l and 2.

In the form shown in Fig. 4, a metal core 35 is flared outwardly at 36to engage a complementary arcuate face 3l on the inner periphery of acore header 38, and is spun inwardly at its` outer extremity 39 toengage the non-metallic sleeve 6. In all other respects, themodification of Fig. 4 is similar to the bobbin illustrated in4 Figs. 1and 2.

Theforegoing detailed description is given for clearness ofunderstanding only and no unnecessary limitations should be understoodtherefrom as modifications will be obvious to those skilled in the art.

I claim:

1. A bobbin, comprising: a cylindrical metal core provided with a xed,continuous nonmetallic internal sleeve which is adapted to t snugly onthe spindle blade of a textile machine; a pair of annular metal coreheaders of substantially larger diameter than said metal coreconcentrically secured to the ends of the core, said core headers havingcontinuous outer surfaces of substantial area; a non-'metallic'bobbinbarrel secured snugly on the core headers so as to be positioned therebyin concentric spaced relation to said metal core, -said barrel havingends affording surfaces which are continuous with those on said headers;a pair of cempressible annular washers overlying the ends otthe barrel;a pair of non-metallic bobbin Vheads having continuous inner surfaceswhich abut against said washers and the outer surfaces of the coreheaders; and a plurality of removable fastening `members spacedoutwardly from the core to detachably secure said bobbin heads firmlyagainst said core headers and compressible washers to exert acompressive force on the washers and on the ends of the said barrel.

2. A bobbin according to claim 1 wherein the core headers make threadedengagement with the core and the bobbin heads are bolted to the coreheaders.

' comprising a fixed, continuous sleeve of laminated plastic which isadapted to iit snugly on the spindle blade of a textile machine; a pairof annular metal core headers of substantially larger diameter than saidmetal core concentrically secured to the ends of the core, said headershaving outer surfaces of substantial area provided with concentricshoulders, and said core and headers forming a central frame for thebobbin; a bobbin barrel of laminated plastic secured snugly on said coreheaders so as to be positioned thereby in concentric spaced relation tosaid metal core, said barrel having ends affording annular surfaceswhich are continuous with those on said headers; a pair of compressiblewashers surrounding the shoulders on the core headers and overlying theends of the bobbin barrel; a pair of laminated plastic bobbin headshaving concentric shoulders complementary to the shoulders on said coreheaders and inner surfaces which abut against the headers and thewashers; and a plurality of screws extending through said bobbin headsand washers to detachably secure the heads firmly to said headers toexert a compressive force on the washers and bobbin barrel.

REXFORD P. BENNETT.

REFERENCES CITED The following references are of record in the le ofthis patent:

UNITED STATES PATENTS Number Name Date 1,862,694 McConnel et al. June14, 1932 2,083,337 Mack June 8, 1937 2,304,922 Hoseld Dec. 15, 19422,453,247 Moss Nov. 9, 1948

